I've either modified every frame I've owned/tried or wanted to. The only exception would be the Wilson 6.1 Classic, now known as the 6.1 95 16x18. I don't own one but I've never felt like I wanted to change anything about it.

KPS88 - I had two that I didn't have to modify (one was 0.1 over spec and the other was 0.3 over spec), and three others that were a lot lighter. Unfortunately Wilson discontinued the model and it doesn't appear that they will ever have anything similar.

The quality issues are a given for the vast majority of racquet companies so I'm resigned to customization. It would be nice to be able to get the same frame for more than a few years but most manufacturers want to move you along regularly.

Diablo Mid. It feels hits like a MP and plows like a el camino on monster truck wheels driving through a fine china shop that sells professional grade fireworks out the back. The old Diablo Mid, plays like awesome feels

pretty much anything in the 6.1 line, minus the lighter stuff(team, etc.) and the prince diablo MP as someone else said was really nice. Pure drive roddick with a leather grip and an overgrip i wouldnt change.